Quick-Check; Preventative Maintenance - Flowserve Valtek MaxFlo 3 Installation Operation & Maintenance

Table I: Line Flange Bolting Specifications
MaxFlo 3 flanged
Nominal
Valve
Size x Length
Pressure /
size
Rating
Inches Metric
ANSI 50 / X .6 M X 65
ANSI 300 5/8 X 3. M6 X 80
DN5
"
PN 6 M X 70
PN 40 M X 70
ANSI 50 / X .88 M X 70
ANSI 300 3/4 X 3.6 M0 X 95
DN40
½"
PN 6 M6 X 80
PN 40 M6 X 80
ANSI 50 5/8 X 3.5 M6 X 85
ANSI 300 5/8 X 3.5 M6 X 90
DN50
"
PN 6 M6 X 85
PN 40 M6 X 85
ANSI 50 5/8 X 3.6 M6 X 95
ANSI 300 3/4 X 4.5 M0 X 0
DN80
3"
PN 6 M6 X 85
PN 40 M6 X 95
ANSI 50 5/8 X 3.6 M6 X 95
ANSI 300 3/4 X 4.5 M0 X 5
DN00
4"
PN 6 M6 X 85
PN 40 M0 X 00
ANSI 50 3/4 X 3.75 M0 X 05
ANSI 300 3/4 X 4.88 M0 X 5
DN50
6"
PN 6 M0 X 00
PN 40 M4 X 5
ANSI 50 3/4 X 4.5 M0 X 0
ANSI 300 7/8 X 5.5 M X 40
DN00
8"
PN 6 M0 X 00
PN 40 M7 X 35
ANSI 50 7/8 X 4.6 M X 0
ANSI 300  X 6.5 M4 X 55
DN50
0"
PN 6 M4 X 0
PN 40 M30 X 50
ANSI 50 7/8 X 4.75 M X 0
ANSI 300  /8 X M7 X 70
DN300
"
PN 6 M4 X 5
PN 40 M30 X 60
4

QUICK-CHECK

Before commissioning, check the control valve by fol-
lowing these steps:
4. Check for full stroke by varying the instrument signal
settings appropriately. Observe the plug position in-
dicator located on the actuator or the positioner. The
plug should change position with a smooth turning
movement.
4. Check all air connections for leaks. Tighten or replace
any leaking lines.
4
®
MaxFlo 3 flangeless
Size x Length
Qty/ valve Inches Metric
8 / X 6.75 M X 70
8 5/8 X 6.88 M6 X 75
8 M X 75
8 M X 75
8 / X 7.50 M X 90
8 3/4 X 8.38 M0 X 5
8 M6 X 00
8 M6 X 00
8 5/8 X 8.38 M6 X 5
5/8 X 3.50 M6 X 90
6
5/8 X 8.50 M6 X 0
8 M6 X 5
8 M6 X 5
8 5/8 X 0.5 M6 X 65
3/4 X 4.5 M0 X 0
6
3/4 X .00 M0 X 80
M6 X 85
6
M6 X 55
M6 X 95
6
M6 X 65
5/8 X 3.6 M6 X 95
6
5/8 X .5 M6 X 95
6 3/4 X 4.5 M0 X 5
3/4 X .5 M0 X 35
M6 X 85
6
M6 X 85
M0 X 00
6
M0 X 300
3/4 X 3.75 M0 X 05
6
3/4 X 3.5 M0 X 340
3/4 X 4.88 M0 X 5
4
3/4 X 4.00 M0 X 360
M0 X 00
6
M0 X 335
M4 X 5
6
M4 X 350
6 3/4 X 4.5 M0 X 360
7/8 X 5.5 M X 40
4
7/8 X 5.9 M X 390
M0 X 00
4
M0 X 350
M7 X 35
4
M7 X 385
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3
4
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4
3
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User instructions - MaxFlo 3 - VLENIM0052-02 02.07
4.3 Check packing box bolting for proper tightness.
CAUTION: Do not overtighten packing. This can cause
Qty/ valve
excessive packing wear and high stem friction that may
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impede shaft movement. After the valve has been in serv-
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ice for a short period, recheck the packing-box nuts. If
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the packing-box leaks, tighten the nuts just enough to
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stop the leak.
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4.4 Make sure the valve fails in the correct direction in case
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of air failure. This is done by positioning the valve at mid-
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stroke and turning off the air supply and observing the
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failure direction. If the action is incorrect, see the sec-
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tion "Reversing the Air-action" in the instructions of the
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installation, operation and maintenance manual of the
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appropriate actuator.
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6 5

PREVENTATIVE MAINTENANCE

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At least once every six months, check for proper op-
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eration by following the preventative maintenance steps
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outlined below. These steps may be performed while the
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valve is in-line and without interrupting service. If an in-
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ternal problem is suspected, refer to section "Valve Dis-
6
assembly".
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6
5. Look for signs of gasket leakage through the end flanges
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and bonnet. If necessary, re-torque flange, bonnet and
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post bolting.
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5. Examine the valve for damage caused by corrosive fumes
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or process drippings.
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5.3 Clean the valve and repaint areas of severe oxidation.
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4 5.4 Check the packing-box for proper tightness. If there is
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a persistent leak, change the packing after referring to
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sections "Valve Disassembly and Body Reassembly".
4
0
CAUTION: Do not overtighten packing. This can cause
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excessive packing wear and high friction that may im-
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pede shaft movement.
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5.5 If the valve is equipped with a lubricator, add lubricant if
necessary.
5.6 If possible, stroke the valve and check for smooth, full-
stroke operation. Unsteady shaft movement may indicate
an internal valve problem.
5.7 Check the calibration of the positioner. For further pre-
ventative maintenance, see the instructions in the instal-
lation, operation and maintenance manual for the appli-
cable positioner.
5.8 Ensure all accessories, brackets and bolting are securely
fastened.
5.9 If possible, remove air supply and observe actuator for
correct fail-safe action.
5.0 Check the actuator and all air connections for leaks.
5. If an air filter is supplied, check and replace the cartridge
if necessary.